Cutting blade



FIG. 1 is a perspective view of a cutting blade showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a right side view thereof; and,

FIG. 5 is a rear plan view thereof.

The broken lines shown in the drawings are included for the purpose of showing portions of the cutting blade that form no part of the claimed design. 

CLAIM The ornamental design for a cutting blade, as shown and described. 